Consider a two-stage cascade refrigeration system operating between the pressure limits of 0.8 and 0.14MPa. Each stage o

[answerhappygod]

Consider A Two Stage Cascade Refrigeration System Operating Between The Pressure Limits Of 0 8 And 0 14mpa Each Stage O 1 (81.25 KiB) Viewed 39 times

Consider a two-stage cascade refrigeration system operating between the pressure limits of 0.8 and 0.14MPa. Each stage operates on the ideal vapor-compression refrigeration cycle with refrigerant-" X " as the working fluid. Heat rejection from the lower cycle to the upper cycle takes place in an adiabatic counterflow heat exchanger where both streams enter at about 0.4MPa. If the mass flow rate of the refrigerant through the upper cycle is 0.24 kg/s, determine (a) the mass flow rate of the refrigerant through the lower cycle, (b) the rate of heat removal from the refrigerated space and the power input to the compressor, and (c) the COP of this cascade refrigerator.